• Base on the weighing feature of the shallow coal bed, the specifying method of the support working resistance and safety margin is presented in the shallow coal bed.

    依据煤层矿压显现特征给出浅埋煤层长壁开采工作面支架合理工作阻力安全界限确定方法

    youdao

  • The less likely you can get out of bed and go to the gym because you have all these shit weighing you down.

    可能床上起来健身房锻炼因为这些在压着你。

    youdao

  • The less likely you can get out of bed and go to the gym because you have all these shit weighing you down.

    可能床上起来健身房锻炼因为这些在压着你。

    youdao

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